Shipping is free to Amazon Prime members or on orders over $25. About this item: Enough Space: Flat plug power strip has 8 AC outlets, 2 inches apart between two outlets. Easy plug your devices in the socket and adapt to larger size plugs. SMART USB PORTS: The USB power strip with 4 usb ports, single USB output is up to 2.4A/12W(Total USB output is 3.1A/15W). Safety: Smart power strip is lightning protection, surge protection, overload protection, and fireproof. It will automatically cut off power to protect connected devices when the current over the limit. Stable voltage: Switching power supply IC uses pulse width modulation(PWM), Keep the output voltage stable